t3ui06>root -n 
  *******************************************
  *                                         *
  *        W E L C O M E  to  R O O T       *
  *                                         *
  *   Version   5.32/00   2 December 2011   *
  *                                         *
  *  You are welcome to visit our Web site  *
  *          http://root.cern.ch            *
  *                                         *
  *******************************************

ROOT 5.32/00 (branches/v5-32-00-patches@42372, Jun 14 2012, 16:18:00 on linuxx8664gcc)

CINT/ROOT C/C++ Interpreter version 5.18.00, July 2, 2010
Type ? for help. Commands must be C++ statements.
Enclose multiple statements between { }.
root [0] .L a.C
root [1] a a1
a ctor
f1 Writable = 1
root [2] .q
a dtor
f1 Writable = 0
Warning in <TFile::Write>: file a.root not opened in write mode
t3ui06>source /swshare/cms/slc5_amd64_gcc434/lcg/root/5.27.06b-cms23/bin/thisroot.csh
t3ui06>root -n 
  *******************************************
  *                                         *
  *        W E L C O M E  to  R O O T       *
  *                                         *
  *   Version  5.27/06b   5 November 2010   *
  *                                         *
  *  You are welcome to visit our Web site  *
  *          http://root.cern.ch            *
  *                                         *
  *******************************************

ROOT 5.27/06b (branches/v5-27-06-patches@36515, Nov 05 2010, 15:46:56 on linuxx8664gcc)

CINT/ROOT C/C++ Interpreter version 5.18.00, July 2, 2010
Type ? for help. Commands must be C++ statements.
Enclose multiple statements between { }.
root [0] .L a.C
root [1] a a1
a ctor
f1 Writable = 1
root [2] .q
a dtor
f1 Writable = 1
t3ui06>